Stool



FIG. 1 is a front top perspective view of a stool according to the present invention;

FIG. 2 is a front view of the stool illustrated in FIG. 1;

FIG. 3 is a top view of the stool illustrated in FIG. 1; and,

FIG. 4 is a side view of the stool illustrated in FIG. 1. 

CLAIM The ornamental design for a stool, as shown and described. 